Cita APA (7th ed.)

Botkin, D. B., & Keller, E. A. (1997). Environmental science: Earth as a living planet (2nd ed.). John Wiley & Sons.

Cita Chicago (17th ed.)

Botkin, Daniel B., i Edward A. Keller. Environmental Science: Earth as a Living Planet. 2nd ed. New York: John Wiley & Sons, 1997.

Cita MLA (9th ed.)

Botkin, Daniel B., i Edward A. Keller. Environmental Science: Earth as a Living Planet. 2nd ed. John Wiley & Sons, 1997.